Sanders said that she doesn't have more specifics on when the military will implement President Trump's ban on transgender individuals serving in the military.
"I don't have a specific timeline," she said. "I know they're ready to start moving."
Acting Immigration and Customs Enforcement (ICE) Director Thomas Homan on Thursday said that so-called "sanctuary cities" are a "criminal's best friend."
"Sanctuary cities are a criminal's best friend," he said during a White House press briefing. "Those who enter the country illegally, that's a crime."
"We've got to tell people it's not OK to violate laws in this country," Homan added. "You've got to respect the laws of this country."
Sanctuary cities are jurisdictions have policies limiting cooperation with local law enforcement and federal immigration agents.
Cities that have sanctuary policies include major metropolitan areas across the country like Chicago, New York and Austin.
New White House press secretary Sarah Huckabee Sanders on Thursday addressed the press during a new briefing.
Sanders' public remarks come as President Trump's administration deals with a number of issues including healthcare reform and transgender military service policy.